The Effect of Different Light Intensities on Physiological and Biochemical Responses in Cyanobacterium Schizothrix vaginata under Naphtalene Treatment

Authors

  • Bolfion, Mehdi
  • Ebrahimi, Bohlol
  • Iranshahi, Shaghayegh
  • Nazari, Fatemeh
  • Rahmani, Morteza
Abstract:

Petroleum hydrocarbons pollution is one of the problems in the environment due to petroleum industry processes. Biological methods are novel routs to defend against them. In this research, the effect of light intensities on biodegradation of naphthalene and the physiological responses of cyanobacterium Schizothrix vaginata is investigated. In this order, studied cyanobacterium transfered to liquid medium, after isolation in the solid BG11 medium. Following transferred to a liquid medium the alga was treated with naphthalene %0.05. OD, dry weight, chlorophyll, and phycobiliproteins were measured spectrophotometrically and naphthalene degradation was studied by gas chromatography (GC). Data obtained from physiological analysis were evaluated by historical data pathway via Design Expert software. According to the results, the maximum chlorophyll and phycobiliproteins contents belonged to 5000 lux. The reduction percent of Naphtalene also enhanced with increasing of light intensity and achieved its maximum in 3th hour. Dry weight reduced under naphthalene treatment by time, indicated negative effect of this pollutant on studied cyanobacterium. The obtained results suggest that microbial biodegradation of pollutants can be used to clean up contaminated environments. Biotreatment of wastes using living organisms is an environmentally friendly, relatively simple and cost-effective alternative to physico-chemical processes.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Effect of salinity on some physiological and biochemical responses in the cyanobacterium Synechococcus elongatus

In this study, some physiological and biochemical responses of Synechococcus elongatus to salt stress were investigated. The cyanobactrium was grown in BG-11 medium under different concentrations of NaCl (0, 0.5, 1 M). The results indicated that the growth of S. elongatus was significantly inhibited under salt stress on days 5, 9 and 12. Protein content increased in S. elongatus on day 12 in pr...

full text

the effect of task cognitive complexity and time limit on the performance of the learners with different proficiency levels in second language writing skill

this study investigated the effects of manipulating the cognitive complexity of tasks along +/- few elements and the time limits on l2 learners writing performance. to conduct the study, 60 iranian efl learners with two levels of proficiency, low and high intermediate, were selected and assigned to three groups based on the time devoted to task completion. the participants performed both a simp...

15 صفحه اول

Growth, Physiological Responses and Secondary Metabolite Production in Pinellia Ternata under Different Light Intensities

Pinellia ternate (Thunb.) Breit (Araceae) is a shade-tolerant perennial medicinal plant, but its optimum light intensity is not sufficiently known. Hence, the influence of light intensity on the physiological responses, growth and secondary metabolic products in P. ternata under four light conditions (15%, 25%, 45% and 100% of full sunlight) in a greenhouse were to be investigated. The results ...

full text

the effect of oxytetracycline on serum calcium, phosphorus and magnesium in cattle

نتایج این مطالعه نشان می دهد که مقدار کلسیم (یونیزه و تام)، منیزیم و فسفر به طور معنی داری تغییر پیدا کرد به جزء مقدار کلسیم تام و منیزیم در روش داخل عضلانی که تغییر معنی داری نداشته است. بر اساس نتایج این مطالعه می توان نتیجه گیری کرد که اکسی تتراساکلین بر روی مقادیر سرمی کلسیم و منیزیم تأثیر می گذارد باید مقدار این کاتیون ها در بیماران، در هنگامی که اکسی تتراسایکلین استفاده می شود مورد توجه ق...

15 صفحه اول

the washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests

در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است

15 صفحه اول

Effects of ascorbic acid on physiological and biochemical responses of Zinnia elegans L. to different levels of light intensity

The aim of this study was to investigate the effect of different light intensities and ascorbic acid on some physiological and biochemical characteristics of Zinnia elegans L. The experiment was designed as a completely randomized design in a form of split-plot with three replications. The treatments were consisted of three light intensity levels (600, 1200 and 1800 μmol m-2 s-1) as the main fa...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 4  issue 4

pages  32- 25

publication date 2015-04

By following a journal you will be notified via email when a new issue of this journal is published.

Keywords

No Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023